[JavaScript知识库]基于wkhtmltopdf.exe和c#实现后台生成pdf文件

1.准备：

下载wkhtmltopdf.exe软件，

?

2.前端代码

参数div为需要打印部分的div整个元素内容；

$.ajax({
            type: "post",
            url: "./html2pdf.ashx?m=HtmlToPDF",
            dataType: "json",
            data: { div:encodeURI(div)},
            success: function (data) {
                console.log(data)
            }
        });

3.后端代码

using System.Diagnostics;
using System.Web;
using System.IO;
using System;
using HtmlAgilityPack;
public string HtmlToPDF(HttpContext context)
    {
        string filename = DateTime.Now.ToString("yyyyMMddhhmmss");
        //获取要打印的节点页面div元素内容 
        string div= context.Request["div"] == null ? "" : context.Request["div"].ToString();
        string content = HttpUtility.UrlDecode(div);
        //将需要打印的内容转为html对象
        var printHtmlDoc= new HtmlDocument();
        printHtmlDoc.LoadHtml(content);
        //加载模板html文件
        var templateHtml = @"http://localhost/JJLBSWEB/JJLBSResource/Page/Default/WorkSummary/test.html";
        HtmlWeb web = new HtmlWeb();
        var templateHtmlDoc = web.Load(templateHtml);
        //获取body节点
        var templateHtmlBody = templateHtmlDoc.DocumentNode.SelectSingleNode("//body");
        HtmlNodeCollection children = new HtmlNodeCollection(templateHtmlBody);
        children.Add(printHtmlDoc.DocumentNode);
        //将要打印的节点页面div添加到body元素里
        templateHtmlBody.AppendChildren(children);
        //获取整个html文件内容字符串
        //string s =templateHtmlDoc.DocumentNode.InnerHtml;
        //var htmlDoc2 = new HtmlDocument();
        //htmlDoc2.LoadHtml(s);
        string dovSavePath = @"E:\*\" + filename + ".html";
        TextWriter tw = File.CreateText(dovSavePath);
        templateHtmlDoc.Save(tw);
        string exePath = "D:\\wkhtmltox\\bin\\wkhtmltopdf.exe";
        string url = "http://localhost/*/"+filename+".html";//html页面url
        //生成pdf文件路径
        string pdfUrl = "D:\\"+ filename + ".pdf";//PDF存储的地址

        //生成pdf文件
        ProcessStartInfo processStartInfo = new ProcessStartInfo();//指定启动进程时使用的一组值。
        processStartInfo.FileName = exePath;
        processStartInfo.UseShellExecute = false;
        processStartInfo.WorkingDirectory = System.IO.Path.GetDirectoryName(exePath);
        processStartInfo.CreateNoWindow = true;
        processStartInfo.RedirectStandardInput = true;
        processStartInfo.RedirectStandardOutput = true;
        processStartInfo.RedirectStandardError = false;
        processStartInfo.Arguments = " " + url + " " + pdfUrl;

        Process process = new Process();
        process.StartInfo = processStartInfo;
        process.Start();
        process.WaitForExit(120000);
        process.Close();
        process.Dispose();

        return "";
    }